Thank you for viewing. I opened it when I bought it, intending to use it, but I have never worn it. I will give it away since I don't have a chance to use it in the future. Thank you for your consideration. A fitness tracker with built-in GPS and 24/7 heart rate tracking, boasting a battery life of up to 7 days. - Model Name: Charge 4 - GPS Function: Built-in GPS - Heart Rate Tracking: 24/7 Heart Rate Tracking - Battery Life: Up to 7 days - Fitbit Pay: Supported - Sleep Score: Sleep Score function *Please note that cancellations after the product has been shipped are not accepted.